Improvement in sheet-metal roofs



c. w. EVANS.

SHEET-METAL ROOFS.

Patented Dec. 21,1875.

UNITED STATES.

PATENT OFFICE.

CHARLES w. EVANS, OF CINCINNATI, OHIO.

IMPROVEMENT IN SHEET-METAL ROOFS.

Specification forming part of Letters Patent No. 171,368, dated December 21, 1875; application filed November 17, 1875.

To all whom it may concern:

Be it known that I, OHARLEs W. EVANS, of Cincinnati, Hamilton county, State of Ohio, have invented an Improvement in Sheet-Metal Roofs,of which the following is a specification:

My invention consists in such a formation of the sheet by cutting and lapping as that a lap-joint is provided at the lower edges of the sheets, and a complete ridge-piece, without the necessity of extending the lap-joint over the ridge.

Figure 1 is a perspective view of a section of roofing embodying my invention. Fig. 2is a perspective view, showing the method. of securing any two contiguous sheets in one row.

Let A represent a portion of primary roofing, upon which the metal roofing composed of plates B is to be secured. The plates B are joined together in rows, and the rows secured together, so that the seams of the individual plateconnections will break joint. Each plate B has one end, b, bent under and back, and one end, b, bent upward and back, so that the sheets may be strung together in such a manner that water running over them will hay e no chance to seep through. The edges 0 O of the sheets B are bent up to form ridges, so that the lapping joint between the sheets will be elevated; but the edge 0 is made intentionally longer than the edgeG, so that when said edge 0 is brought in contact with edge (J of another sheet, in the act of forming a rid ge-connection between the sheets, the predominating portion of edge 0 may be bent down over edge 0, to form a covering and protecting lap, 0; but it is obvious that it the quadruple thickness caused by the lap-connection b b of the sheets B were carried over this ridge and through the lap c, the roofing would become very impracticable, partly from the difficulty which would arise in attaching the lap b b of two consecutive sheets, (said laps b b having in that case too intricate a contour to cause them to engage readily,) and partly because the thickness of the joint would prevent the formation of a snug ridge-joint,without the application of excessive hammering, which would be likely to break the metal and injure the durability of the roof. To obviate this, I form the sheets B, as shown in Fig. 3, with the metal'c" bound by the edges 1 and 2 of the sheet, and the fold-lines 3 and 4 cut away at both ends of the sheets, thus leaving the lap c, which is of single thickness, except at the joint between the sheet B B of a row, of not more than double thickness at any point, while the laps b b will be much simpler, in extent running merely across the sheet and up at the ridges G 0', without extending over the ridge 0. The plates B are secured to the roof-boards A by clips D engaging with the laps b at the ends. To secure the edges of the sheets to the roof-boards I provide clips E of such extension that, after being secured to the roof A, they are bent up, over, and down the edges 0 of the sheets B, and, after the lap c of the contiguous row of sheets is capped over said edges 0, the clip is bent up and over said lap c to secure it to the roof.

Having thus described my invention, I claim- In a sheet-metal roof, the sheetsB, having folds b b, ridges O O, and ridge-lap of, when formed from a sheet having notches c, substantially as described, and for the purpose specified.

In testimony of which invention I hereunto set my hand.

CHARLES NVALTER EVANS.

Witnesses:

J QHN E. JONES, J. L. WARTMANN. 

